Some applications I’ve not seen yet:

Terminal

ntorga.com/gzip-bzip2-xz-zstd-7z-brotli-or-lz4/

• lz4 - fastest compression/decompression (several GB/s); compression is good, but not amazing; very little CPU usage
• zstd - very fast compression, fast decompression (few GB/s compression; ~600MB/s for decompression; better or equal compression compared to zip, depending on level)
• cloc <folder> - gets lines of code for a project/folder
• gdu <optional location> - like ncdu, but faster (written in go) - think TreeSize/WinDirStat for the terminal
• stat <file> - built-in application to show the modified, created, etc stats for a file.
• hyperfine - benchmark for binaries - run this in front of a command to have it run multiple times, and show some statistics.
• jpegli - great to recompress JPEG files into smaller filesizes, with only very few/minor visual effects.
• just - used with a Justfile in a project so I can run just to see the commands, or run just test, just clean, just … to run project-specific commands.
• msedit - ye olde edit.com, reborn! Feels a little bit cursed to use an MS text editor on the terminal, but it’s better for beginners than nano or micro or whatever.
• oxipng - lossless png compression
• pngquant - lossy png compression (it forces the file to use a palette of n colors, which reduces the colors used, so it will affect your files, unlike oxipng.
• upx - compress binary files
• visidata - analyses csv files, and shows some stats. Like Data Wrangler for the terminal
• oxfmt - think “oxidized prettier” (file formatter for programmers)

GUIs

• Whatpulse - I’ve been tracking my keypresses since 2005. not a terminal application, unlike the rest.
• fsearch - Linux alternative to Everything by Voidtools. It will be a little bit different, but it does the job. mlocate package, with the sudo updatedb and locate commands, if you prefer the terminal
• keepassxc - password manager
• speedcrunch - best GUI calculator, IMO. Just a bar for input, and a bunch of stored results above it. Use the ans variable to use the previous answer in the current calculation, like ans*2 to multiply the previous answer. Or use variables, like x=5, y=2, x+y: 7.